Not everyone agrees on these forms or on the names of them. This includes Katamba. If we include base-extenders (stem-extenders_ as some kind of near-morph or submorph, then a root is that part of a ...
All you need to do is identify the parts of the word. Find out what a root word is and how to identify the parts of a word. Work out the meaning of new vocabulary using the building blocks of words.